Pure aniline is evaporating through a stagnant air film of 1 mm thickn – McqOptions

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1.	Pure aniline is evaporating through a stagnant air film of 1 mm thickness at 300 K and a total pressure of 100 KPa. The vapor pressure of aniline at 300 K is 0.1 KPa. The total molar concentration under these conditions is 40.1 mole/m 3 . The diffusivity of aniline in air is 0.74xl0 -5 m 2 /s.The numerical value of mass transfer co-efficient is 7.4 x 10 -3 . Its units are
A.	m/s
B.	cm/s
C.	mole/m 2 .s.Pa
D.	kmole/m 2 .s.Pa
Answer» D. kmole/m 2 .s.Pa

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